Police are calling on the public for help after a teenage girl was reportedly dragged screaming into a car by a man in West Auckland last night.

Detective Laura Ellis said a member of the public reported seeing the girl, thought to be about 16, being dragged into a car in Glen Eden about 11pm, near the Caltex petrol station on West Coast Rd.

The person heard the girl scream for help before being pulled into the backseat of a late-model black hatchback by a tall, solid Polynesian man. Two other people were in the car.

The car then sped off, driving erratically towards the intersection of West Coast and Parrs Cross roads, Ellis said.

It then turned left and continued along West Coast Rd, towards Oratia.

The woman involved was believed to be caucasian with light brown hair past her shoulders. She was about 162 centimetres tall.

"We'd like to hear from anyone who may have seen this incident, or anyone who was in the car involved. At this stage no-one has been reported missing but we are taking the matter seriously," Ellis said.